32 Bit OS support
64-bit Hardware Support

Since DAZ has Studio 4 pro for free I downloaded it and wondered if anyone could tell me what this means.

k that's prolly 32 bit mac OS suupport and 64 and 32 bit windows support i only have the windows version show up in my cart and i get the dl link for both 32 and 64 versions.  good thing i have one of each that i use lol

Thanks ... that makes sense.  I just downloaded the 64 bit version.

cool cool glad i could be of assistance

The Mac version is 32 or 64 bit. OS 10.5, 10.6 and 10.7 are 64 bit and can run 32 bit applications, they were developed for 64 bit Intel CPU's DS4 was the first 64 bit Mac Studio version

64 bit OS's can run 32 bit software with the limitations of 32 bit software, if you have 16GB RAM and run Daz Studio 4 32 bit in Windows 7 64 bit you are restricted to no more than 4GB RAM for the 32 bit application, which is better than the 2GB (by defualt) or 3GB (if you modify boot.ini or cmd line) of all 32 bit XP, Vista, Win7, etc.

So you can install both 32 and 64 bit version of Studio 3 & Studio 4 and use them all four of them at the same time if you want.